Rivet



l0, 1 J. & CAMPBELL 2,

Rmrr Filod Feb; 19,1944 4 Shasta-Sheet -1 John E. Campbell lNVE-NTOR Oct. 10, 1950 J. a CAMPBELL ,1

RIVE'I Filed Feb. 19, 1944 4 ShfltU-Sbfl 2 F1 Er. 5.

John B.. Cam 2587f INVENTOR Get. 10, 1950 J. B. CAMPBELL RIVE'! 4 Shasta-Shoot 3 Filed Feb. 19, 1944 do/m 5. Qmpbel/ I N VEN TOR.

Patented Oct. 10, 1950 UNITED. STATES PATENT OFFICE RIVET John B. Campbell, Detroit, Mich.

Application February 19, 1944, Serial No. 523,041

4 Claims. (61. 85-40) This invention relates to a screw clinch rivet.

It is an object of this invention to produce a rivet which can be installed entirely from one side of the work without any support on the other side of the work. This invention also contemplates such a rivet which is simple in struc ture, easy to install, and which will effectively hold the work together.

Fig. 1 is a sectional view showing my rivet in position in'the work prior to being clinched, and

Fig. 2 shows the rivet clinched on the work.

Fig. 3 is a section along the line 33 of Fig. 1. Fig. 4 is a section along the line 4-4 of Fig. 2. Fig. 5 is a section of a modified form of rivet positioned in the work preparatory to being clinched, and

Fig. 6 is a section of the same rivet after being clinched in position.

Fig. 10.

Figs. 12 and 13 are sectional views showing another modified form of rivet.'

Referring more particularly to the drawings the work whichis to be riveted together comprises panels I and 2 which, by way of example,

may be sheet metal wing sections of an airplane:

The element 3, shown in dotted lines, closes oil a space so that the panels I and 2 must be riveted from one side only. Panels l and 2 are provided with rivet holes 4 and 5 which coincide to receivethe rivet.

The rivet comprises a hollow tubular body memher 6 having an outer flange I provided with four radial slots 8 for reception of the installing tool.

The interior face of the hollow rivet '6 is threaded as at 9 and arranged to receive a screw plug Ill having a conical head Ii. The screw plug Ill is provided with radial slots l2 in its inner end for reception of the screw driver. The inner end of the tubular rivet 6 is provided with one or more radial slots l3 which extend into the tubular body to about flush with the surface of the inner in this position screw plug I0 is screwed into the.

hollow body 6 thereby causing theconical face ii to clinch over the slotted inner end of the hollow rivet as indicated at ll, Fig. 2, to securely lock or clinch panels i and 2 together.

The tool for screwing the plug l0 into the hollow rivet 6 is shown in Fig. 2 and comprises a screw driver I6 provided with handle it and a point H which interengages the inner end of screw plug ill in slot I2. Slot or socket i2 and driver point I! can be any well-known or conventional shape such as in an Allen-or Phillips screw. A holding member i6, provided with two teeth l9 which interengage the hollow sleeve 6 in slots 8, is slidably and rotatably mounted over shank l5 of the screw driver. Member l6 is backed up by compression coil spring 20 which abuts against shoulder 2| on shank I5. As handle I6 is pushed upwardly, as viewed in Fig. 2, spring 20 is under compression and acts through memher I! and teeth ill to press the flange I of sleeve 6 against the outer face of panel 2 and thereby frictionally hold sleeve I against turning while screw plug I0 is turned into the sleeve 6 to expand its inner end.

The tool I5 is shown merely for purposes of illustration. Obviously any tool or tools can be used for. installing the rivet which will hold sleeve 6 against turning while screw plug it is being. screwed into sleeve 6 to expand its nner end; or, vice versa, plug Ill can be held stationary and sleeve 6 turned on to plug It to clinch over the inner end of the rivet.

From the above it will be seen that the rivet can be clinched or locked in position in panels I and 2 from the outer side of panel 2 without any need for support on the inside of panel I. I

The form of rivet shown in Fig. 5 differs from that shown in Fig. 1 only in that the inner end 25 of the hollow sleeve or tubularrivet 6 is not arranged to be clinched over the inner panel I. The inner end of sleeve 6 is beveled or formed in the shape of a cone 26 and a spring steel washer 21 is mounted. over the stem of the screw plug in between the one end 26 of the sleeve 6 and the conical head ll of the screw plug Ill. The spring steel washer 21 is concavo-convex as shown. As the'screw plug i0 is screwed into the sleeve 6, conical head ll draws washer 21 down over the conical end 26 of sleeve 6 into tight locking engagement with the inner face of panel I so that panels I and 2 are locked between the spring steel washer 21 and flange I.

In the modification shown in Fig. 9 the inner end of the hollow sleeve 6 is provided with an circumferential flange 30 having an inwardly turned or return bent portion 3| which seats against the conical face II of the screw plug l0. The inner end of sleeve 6 is countersunk as at 32 to receive the conical end II of screw plug I0. As screw plug I is screwed into sleeve 6, flange 3| is forced against flange 30 and both of the flanges are clinched outwardly over the inner face of panel I, as indicated in the dotted lines, Fig. 9, to thereby lock or rivet the panels I and 2 together.

Fig. 10 shows a rivet which is a modification of that shown in Fig. 9 in that the rivet shown in Fig. 9 has been modified and adapted for countersunk opening 40 in panels I and 2. In this case sleeve 6 of the rivetis provided with" an outer conical head 4| arranged to fit tightly and snugly in the countersunk opening 40. As screw I0 is turned into the conical headedsleeve 6.

flanges 30 and 3| are bent outwardly and downmade from plastic, fiber, hard rubber or metaL' In the form shown in Fig. 12 the tubular body is arranged to be clinched over the work I and 2 by a screw plug It in a manner substantially the same as the form shown in Fig. 1 except that the wedge face 5| of the screw head is arcuate in cross section. The outer end of the rivet is closed by a screw plug 52 provided with a screw eyelet 53 which can be used as a support or as a means of attaching anything desired to the work and 2. In Fig. 13 the outer end of the rivet is closed by a screw plug SI.

In all of the forms of rivets, except that shown in Figs. 5 through 8, the rivet in assembled position in the work seals the holes 4 and 5 in the work.

It is understood that after the tubular rivet body 6, Fig. 2, or body 50, Fig. 12, has been clinched over the screw plugs Hi can be removed and the thus clinched over tubular rivet will hold or rivet the work together. In most cases however, it is preferred to leave the screw plug I0 in the riveted or clinched over tubular rivet body.

Iclaim:

1. A two-part rivet comprising a body member havin an enlarged head and a screw-threaded central bore, and a bolt somewhat shorter than said body member threaded in said bore and having an enlarged head covering the end of the body member opposite its enlarged head, the end of said bolt opposite its enlarged head having means for interlocking with a rotating instrument so as to be positively rotated thereby and the enlarged head of the body member 'having means for accommodating an element for holding the member stationary while the bolt is rotated.

2. A rivet according to claim above in which the end of the body member adjacent the enlarged head of the bolt is internally beveled.

3. A rivet comprising a tubular sleeve for passiii ing through registering openings in front and rear plates with its rear end portion projecting from the rear plate, said sleeve having a head at its front end adapted to overlie the opening in the front plate and having means for holding the sleeve against turning, said sleeve being internally threaded from its front end, the rear end portion of said sleeve having its annular wall internally reduced in thickness, and a screw threaded into said sleeve from the rear end thereof, said screw having an expander at its rear end and at its front end having means for providing a positive drive connection with a turning tool whereby the screw may be advanced forwardly through said sleeve with its expander moving into the rear end of the sleeve and expanding the same to form a head cooperating with the head of the sleeve to clamp the plates between them.

4. A rivet comprising a tubular sleeve for passing through registering openings in plates to be secured, said sleeve being open at both ends, a head at the front end of said sleeve, the rear end portion of said sleeve being adapted to project from the rear plate and having its wall internally reduced in thickness, the wall of the sleeve between its front end and its reduced rear portion being internally threaded, a screw threaded into-said sleeve in interfitting engagement with the threads thereof and having an expander head at its rear end and means at its front end for interlocking with a turning too], said screw being advanced forwardly through said sleeve when turned so that its head moves into and expands the protruding rear end portion of the sleeve to form a head adapted to engage the rear plate and cooperate with the head at the front end of the sleeve to clamp the plates firmly against each other.

JOHN B. CAMPBELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 534,331 Hodgson Feb. 19, 1895 796,574 Fuqua Aug. 8, 1905 1,150,114 Hays Aug. 17, 1915 1,166,049 Hyde Dec. 19, 1915 1,292,069 Robinson Jan. 21, 1919 1,551,381 Foss Aug. 25, 1925 1,814,965 Rosenberg July 14, 1931 1,840,103 Junkers Jan. 5, 1932 1,996,128 Thomson Apr. 2, 1935 2,026,686 Kirley Jan. 7, 1936 2,051,066 Anderson Aug. 18, 1937 2,070,579 Brooke Feb. 16, 1937 2,205,772 Bowersox June 25, 1940 2,298,552 DuVall Oct. 13, 1942 2,313,616 Bowersox Mar. 9, 1943 2,319,376 Wallace May 18, 1943 2,343,283 Davis Mar. 7, 1944 2,385,886 Shafl! Oct. 2, 1945 FOREIGN PATENTS Number Country Date 18,186 Great Britain Aug. 22, 1904 418,914 Great Britain Nov. 2, 1934 

